Nature of Light
Learning Objectives
- Students will be able to describe light as electromagnetic radiation
- Students will be able to explain the wave-particle duality of light
- Students will be able to identify practical consequences of the speed of light
Core Concepts
- electromagnetic_radiation
- speed_of_light
- photon
- wave_properties
- particle_properties
- visible_spectrum
Formulas
$$c = \lambda f$$
Speed of light related to wavelength and frequency
$$E = hf$$
Energy of a photon (h is Planck's constant = 6.63×10⁻³⁴ J·s)
Units
| meter per second | m/s (c = 3×10⁸ m/s in vacuum) |
| nanometer | nm |
Interesting Fact
Light from distant stars took years to reach us; we see them as they were in the past
Key Scientist
Albert Einstein
Explained photoelectric effect, supporting particle nature of light (photons)
Modern Research
Quantum mechanics fully explains light's dual nature through quantum field theory; photons are quantized excitations of the electromagnetic field.
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